import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: GodK
 * Date: 2024-08-03
 * Time: 19:45
 */
public class Main {
    private static void doSearch(File f, String key) {
        StringBuilder stringBuilder = new StringBuilder();
        try (Reader reader = new FileReader(f)) {
            char[] buffer = new char[1024];
            while (true) {
                int n = reader.read(buffer);
                if (n == -1) {
                    break;
                }
                String s = new String(buffer, 0, n);
                stringBuilder.append(s);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        if (stringBuilder.indexOf(key) == -1) {
            return;
        }
        System.out.println("找到匹配的文件: " + f.getAbsolutePath());
    }
    private static void scan(File rootFile, String key) {
        if (!rootFile.isDirectory()) {
            return;
        }
        File[] files = rootFile.listFiles();
        if (files == null || files.length == 0) {
            return;
        }
        for (File f : files) {
            if (f.isFile()) {
                doSearch(f, key);
            } else {
                scan(f, key);
            }
        }
    }
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入源文件的路径: ");
        String rootPath = scanner.next();
        File rootFile  = new File(rootPath );
        if(!rootFile .isDirectory()){
            System.out.println("源文件路径有误!");
            return;
        }
        System.out.println("请输入要搜索的查询词: ");
        String key = scanner.next();
        scan(rootFile,key);
    }
}
